#include <stdio.h>

#include <string.h>



int main()

{

int arr[10][2] = { 0 };

int n = 0, i = 0, j = 0, all = 0, count = 0;

for (i = 0; i < 10; i++)

{

scanf("%d", &arr[i][0]);

}

for (i = 0; i < 10; i++)

{

for (j = 0;j < 10;j++)

{

if (arr[i][0] == arr[j][0])

{

arr[i][1]++;

}

}

}

for (i = 0; i < 10; i++)

{

for (j = i+1;j < 10;j++)

{

if (arr[i][0] == arr[j][0])

{

arr[j][0] = 0;

arr[j][1] = 0;

}

}

}

for (i = 0; i < 10; i++)

{

if (arr[i][1] == 1)

{

printf("%d ", arr[i][0]);

count++;

all += arr[i][0];

}

}

if (count == 0)

{

printf("No");

}

else

{

printf("%.1f", (float)all / count);

}

return 0;

}
